blob: 9cd6b290700fa28881487501bce986510a2a3ef5 [file] [log] [blame]
unsigned long __cdecl _byteswap_ulong (unsigned long _Long);
unsigned long __cdecl _byteswap_ulong (unsigned long _Long)
{
#if defined(_AMD64_) || defined(__x86_64__) || defined(_X86_) || defined(__i386__)
unsigned long retval;
__asm__ __volatile__ ("bswapl %[retval]" : [retval] "=rm" (retval) : "[retval]" (_Long));
return retval;
#else
unsigned char *b = (void*)&_Long;
unsigned char tmp;
tmp = b[0];
b[0] = b[3];
b[3] = tmp;
tmp = b[1];
b[1] = b[2];
b[2] = tmp;
return _Long;
#endif /* defined(_AMD64_) || defined(__x86_64__) || defined(_X86_) || defined(__i386__) */
}